Electric heater.



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FRANK KUHN un FRANK ELECTRIC HEATER. Y

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Specication of Letters Patent,

Application le January 31, ll. Serial No. 815.748.

To all wwqnl il; may concern s r ABe 1t known that We, FRANK Iam-[N T FRANK E. vSHAILIOR, citizens .of the linited States of America,- residing at Detroit, in the county of Wayne and State of llliolngan,

.tra ve invented certain new and nextel lin-`v provements in Elect-rio Heaters, ot n'liieli the following isv a speeiieation7 reiter-ence being had therein to the aeooinpanying drawings.

The ingention relates to electric heaters or thatA type in which the heat developed in a. naked resistor is distrilmted Vby ruliation, the. construction being more particularly adapted for broilers and vtoasters. v. in the drawings. Figure l is an enf.i elevation partly in cross section of tlie heater;

Fig. 2 is a longitudinal section; Fig. i?. is

an enlarged eross section; and Fig. L is a,

plan. M

ln theeonstrnetion of toasters and broilers Wliere the heated resistor is arranged in a horizontal plane,` it is necessary 'to provide a supporting grid for the work. lt is also desirable to furnish intermediate support for the resistor-to prevent tire sagfb' g of the same, and Where a naked resistor is eniloyed these supports n'nist lie insulated. With tlie present construction We iiare de- Tvised a g'id which, in addition to its :tunetion of supporting the bread or other article to be toasted or broiled, also iorms a lto the bars of the grid that the latter support fora naked resistor.

Still another' feature oi" our 'improvement is to arrange the resistor in suoli relation fill not appreeiably interfere with direct radiation. j

in detail, A isa suitable outer traine, which nay'be supported in anjy way, as by the legs .B arranged attlxeV corners thereof.

C is a grid traine composed or longitw dinaily extending bars D and cross bars E,

the ends of which are supported in notolies in the outer frame A.

Each; of the bars -D is preteral ly`iioinied from a folded strip of sheet metal having a crimp or bead F therein. Between *the two plies of the strip is arranged the shank Cv of a hanger G for supporting the resistor.l

and

and to prevent short eirouiting a. refractory insulating material il, such as mica., is arranged intermediate `the shank and the' plies of tlie strip. The hanger G is preferably formed of a sheet.l metal stamping haring an Lportion twisted vinto a plane transverse to that or.' tile slranl: portion and aperturedfor the passage oi' the resistor.

l is the resistor, preferably in 'tlie forni of a. helical coil of Wirev 'which is threaded through the eyes G and is therefore sus pended li); the saine beneath and in the piane ot tlio strips i); ot the grid. lWhere the length of Ilie. resistor is greater than the length or the. strips l), it may be passed troni one strip t` slight shielding produced by the strip wilt merely prevent overheating in the line which is nearestto the radiating surface. Thus a reiv uniform heating effect is produced,-

ivitli the advantage oi" the quick action due to the exposed or naked resistor. i

lVliat We claim as our invention is,-

l. In an eleetrie lieater, .the Combination with grid frame comprising a plurality of parallellyarranged bars and connecting cross bars, of a resistor in the-form of a helical coil extendingparallel to the longitudinal bars beneath the same and in the central plane thereof, the diameter of the eoil being;A greater' than the thickness of the' laars, and insulated supports for said resister from said bars.

2. in an electric heater, the Combination with a bar, oi av resistor, and a hanger for supporting' said resistor from said bar, said hanger having a. portion apertured to re- Patented Septya 215 1915;

eeive said resistor and twisted' into a plane lim 3. In an electric heater, the combination with a grid. frame comprising a plurality of p rallelly-arranged bars and connecting cross bars, of a. resistor in the form of a. 5' helical coil of greater thickness than` the bars, extending-parallel to the longitudinal bars beneath the same and in the central plane thereof..

In'testimony whereof we aix our signatures in presence of two wltnesses.

FRANK KUHN. FRANK E. SHAILOR.

Witnesses:

STANLEY B. OAKns, HENRY lV. LUYCKX. 

